Coupling device for typewriting



H. E. KAMMEL March ZO, 1945.

COUPLING DEVICE FOR TYPEWRITING CALCULATING MACHINES Original Filed May14, 1954 6 Sheets-Sheet l March 20, 1945. H. E. KAMMEL 2,371,826

COUPLING DEVICE FOR TYPEWRITING CALCULATING MACHINES origihal Filed May14, 1934 6 Sheets-Sheet 2 March 20, 1945. H. E. KAMMEL COUPLING DEVICEFOR TYPEWRITING CALCULATING MACHINES Original Filed May 14, 1934 6Sheets-Sheet 3 March 20, 1945. H. E. KAMMEL COUPLING DEVICE FORTYPEWRITING CALCULATING MACHINES Original Filed May 14, 1934 eSheets-Sheet 4 March 20, 1945. HE. KAMMEL 2,371,826

COUPLING DEVICE FOR TYPEWRITING CALCULATING MACHINES Original Filed May14, 1934 6 Sheets-Sheet 5 Lac/r fir.-

(wmbr March 20, 1945. H. E, KAMMEL COUPLING DEVICE FOR TYPEWRITINGCALCULATING MACHINES Original Filed May 14, 1934 6 Sheets-Sheet 6 wwwrak/7. t. Kammel Patented Mar. 20, 1945 COUPLIN G DEVICE FOR TYPEWRITINGCALCULATING MACHINES Hugo Ernst Kammel, Zella-Mehlis, Germany;

vested in the Alien Property Custodian Original application May 14,1934, Serial No. 725,636. Divided and this application July 31, 1939,Serial No. 287,668. In Germany May 15,

Claims. (Cl. 235-59) The invention relates to a coupling device fortypewriting calculating machines of the type exemplified in myco-pending application Ser. No. 725,636, filed May 14, 1934, now Patent2,236,642, issued April 1, 1941, of which the present appli tion is adivision.

One object of this invention is the provision of novel means undercontrol of the calculating keys, and the keys which condition themachine for taking totals of either the cross (grand) totalizers or thecolumn totalizers, or both, to latch the selected key in depressedposition until the completion of the operation initiated by such key,whether adding or total taking.

As a result, the invention is effective for p riods of different lengthsof time, the entry of a digit under control of a calculating keyrequiring much less time than the automatic printing of the total of acolumn or cross totalizer.

Another object is the provision of novel means common to the calculatingand total conditioning keys to automatically effect the disconnection ofthe power from the actuating shaft of the machine at the conclusion ofthe particular kind of operation controlled by the selected key.

A still further object is the provision of novel means under control ofthe actuating shaft'oi the machine, to retain the key-latching mechanism in its effective position during the operation initiated by theselected key.

Still another object is the provision of a keylatching device common tothe calculatin and the total conditioning keys.

Finally, an object of the invention is to provide a novel combinedkey-latch and coupling control to enable and disable the couplingbetween the power and the actuating shaft.

Other objects and advantages will become apparent from the accompanyingspecification and claims read in connection with the drawingsillustrating one embodiment of the invention, in which drawings Figure 1shows a lefthand side elevation of the machine.

Figure 2 shows a plan of the sub-frame in which certain of the driveshafts are mounted together with the calculating keys and the drivecoupling.

Figure 3 shows a perspective illustration viewed from the frontleft-hand side of the machine, of the drive coupling with the combinedkey latching and coupling controlling mechanism, common to all thecalculating keys, in which view the individual parts for the sake ofclearness are represented drawn out from one another.

Figure 4 shows in perspective, details of the key latching and couplingcontrolling mechanism, the parts of which are likewise drawn out fromone another.

Figure 5 shows a perspective illustration of a mechanism belonging tothe means to condition the machine for taking totals from the columntotalizers, viewed from the front left-hand side of the machine,together with a part of the change-over gear for the column totalizersand the total sign printing mechanism for the column totalizers, inwhich view the parts are illustrated partially drawn out from oneanother.

Figure 6 shows a perspective illustration of a mechanism belonging tothe means to condition the machine for taking totals from the crosstotalizers, with the printing mechanism for the sign in additionthereto, and a part of the changeover gear including both the drivingwheels for the cross totalizers, the view being taken from the frontleft-hand side of the machine and various parts being illustrated drawnout from one another.

Fig. 7 is a fragmentary perspective view, showing thecarriage-controlled means to effect the automatic release of the totalkeys at the end of a total printing operation.

The typewriting-accounting machine includes letter typing keys 32(Fig. 1) with their key levers 36, numeral typing keys 33 with theirlevers 35, and calculating keys 34 with their key levers 82 (see Fig. 3)

The key levers 36 and 31 are fulcrumed on the bar 31 at the rear of thetypewriting machine frame, and are held in and returned to normalpositions by their springs 38, determined by the universal stop 39.

The calculating keys 34 are journaled on a cross rod 68, hereinafterreferred to, mounted in the sub-frame 64, and operate the numeral typingkeys indirectly in a manner constituting no part of the presentinvention.

The calculating mechanism drive 58 (Figures 1, 2 and 3) is rotatablymounted in the bearing 50, arranged in the right hand side of themachine housing l, and at its inner end, the shaft 58 is rotatablymoimted in a bearing 6|, secured at 62, to a bridge 63 connecting thetwo side walls, 64 and 65. A fulcrum rod 68 (Figures 1, 2, 3, 5, and 6)is rigidly mounted by means of set screws 51, screwed into bosses 66(Figure 2) on the left and right hand side walls 64 and 65 of themachine housing I, and on this shaft, members to be hereinafterdescribed, are swingably mounted.

In the bearing eye 6I (Figures 1 and 3), a cam 69, (Figure 1, 2, 3) isrotatably mounted by means of the sleeve 69a, rigidly fixed to the cam.The cam 69 is rigidly connected to the cams TI and I2 by screws (notillustrated) which pass through holes ID of the cams. The shaft 58,however, is

not directly connected with the cams, since the cams 69, 'II and I2, aswell as the sleeve 69a, have greater bores 11 (Fig, 3) than the diameterof the shaft 58. The cams 69, El and 72 are prevented from lateraldisplacement by contact of the side 69b of the cam 69 with the edge 6Iaof the hearing eye BI and by contact of the cam I2 with the toothedwheel I3 non-rotatably mounted on the square shaft 58. The toothed wheel13 participates in the rotation of the square shaft 58, whichcontinually rotates in the arrow direction I) (Fig. 3). On the cam 12, apawl I4 (Figures 2 and 3) is displaceably arranged by means of pins TIand i8, which engage in elongated slots (5 of the cam I2, in elongatedslots 16, of the cam II, and in elongated slots (not illustrated) in thecam 69. The pawl 74 is acted on continually in the direction of thearrow 0 (Figure 3) by a compression spring 19, which abuts against thepin 18 fixed to the pawl M, and against the face 12a of the slot 15 inthe cam I2. Moreover, a stud 80 formed on the pawl 14, co-acts with apart to be hereinafter described in detail, by means of which the tooth74a of the pawl '14 is held out of engagement with the toothed wheel 13.In ring grooves (not illustrated) in the ends of the pins TI and I8 ofthe pawl '14, which project from the left-hand side of the cam 69, alocking member 8I is fixed, in the manner illustrated in Figure 3, sothat the pawl 14 always remains in connection with the cams 69., H andI2 and the pawl I4 is prevented from falling out. It may be remarked atthis point that, for the whole ten calculating keys, 34, only onecoupling as just described, is necessary.

Each calculating key lever 82 carries a pawl 95 pivoted thereto at 94(Figures 1 and 3) With the nose 95a of this pawl, a spring 96 engageswhich is connected to a nose 82g arranged on the key lever 82 to rockthe pawl anti-clockwise on its pivot 94. The normal position of the pawl95 is determined by the contact of the right-angled bent nose 951) onthe upper edge of the key lever 82. The downwardly directed end 95d ofthe pawl 95 is capable of co-acting with the rightangled upwardly-bentnose 9'! of a detent bar 98. On the right and left hand ends of the bar98, pintles 98a (Figures 3 and 4) are formed, one pin being arranged ateach end. By means of these pintles, the detent bar 98 is swing-ablymounted on the levers I00 and Itl, rigidly mounted on opposite ends ofthe shaft 99. The shaft, 99, at its right hand end, is rotatably mountedon a set screw I02 (Figure 3) passing through a bracket I03, secured toa cross bar I05 of the sub-frame 64, at I04. On the left-hand side ofthe machine, the shaft 99, is rotatably mounted by means of a cone,bearing I06 (Figure 4) in a similar bracket I01 secured at I08 to thebar I05, already mentioned. The bar I05 is fixed to both side walls 64and 65 of the machine housing I, by screws "35s (Figure 2) which passthrough holes 35a and I05?) (Figures 3 and 4) of the bar I05.

By means of a spring I69, which engages with a lug 98b of the detent bar98, and is connected to a pin 99g (Figure l) rigidly fixed to the shaft99, the detent bar 98, is rocked in the anticlockwise direction aroundits pintles 98d journaled in the upper ends of the arms I09, IOI (Figs.3 and 4), fast on shaft 99 so that its upper surface presses upwardsagainst a laterally bent lug H1311 on the bracket I03, whereby thenormal position of the detent bar 98, is determined.

A key locking bar IIfl (Figures 1, 3 and 4) is rotatably mounted by eyesformed near its opposite ends to encircle the shaft 99, in the mannerindicated in Figures 3 and 4. At the right-hand and left-hand ends ofthe locking bar H0 forwardly projecting pins IIUa are fixed, with eachof which a spring HIlb engages (in Figure 3 this has not beenillustrated for the purpose or rendering other parts visible), whichsprings are connected to bent lugs IIBila or IIlIa of the levers I00 andIQI. By means of these springs [I052 the locking bar is always actedupon round the shaft 99 in the clockwise direction, whereby its normalposition is determined by contact with the laterally extending stop pinwill), riveted to the lever I00 and by contact with the laterallyextending stop pin IOI-b riveted to the lever NH. The right-angledflange IIflg extending along the upper free edge of the keylocking barIII is capable of co-acting with the noses 82h (Figure 3) formed on thecalculating key levers 82, in a manner to be hereinafter described.

On the shaft 99 (Figures 1, 3, 4) further, a rock arm III is rigidlymounted to the free end of which a pin H2 is riveted (in Figur 3 for thesake of illustration the same is indicated as disengaged from its arm).The pin I I2 of the lever III, co-acts with the fork-shaped end of anarm H3, of a clutch-control rocking lever H4, which is swingably mountedon the fulcrum rod 68. The arm II Ia of the rocking clutch-control leverI I4, co-acts with the stud BI], already mentioned, of the pawl 14,while the arm H419, of the clutch control lever co-acts with the cam I2.A spring 'I I5 engages with a pin H lf (in Figure 3, the pin H4 is shownremoved from the lever II 4' for purposes of illustration) riveted tothe nose II Id (Fig. 3) of the clutch control lever N4, the spring atits other end being connected to a pin IISa (Figure 2) on a stay H51),fixed to the subframe base 63' and to the cross stay I05. By means ofthis spring, the clutch control lever H4, is acted on in the clockwisedirectionround the shaft 68, in consequence of which the rock arm IIIconnected to it, the shaft 99, and the levers IE0 and NH pinned to it,the locking flap I I0, and finally the detent bar 93, are acted upon .inthe anti-clockwise direction, whereby the upper face of the lug 98:13,under the action action of the spring we, contacts the bottom face ofthe lateral lugIIiI-Zct of the bracket I03, and the rear edge 98s of thelug 98$, under the action of the spring H5, contacts with the forwardedge 103g of the lug IIl3a of the bracket I03, whereby the normalpositions of the parts H4,

III, 99, Hill, IBI, H0 and 98, is determined.

Further, on the fulcrum rod 68, a lever H6 (Figures 1, 3) is swingablymounted, at the free end of which a roller H7 is arranged, capable ofco-acting with the cam 59. By means of the spring H9, which, on the onehand, engages with the pin H8 of the lever H6, and on the other hand, isconnected to the sub frame base 63, the roller H7, is always maintainedin contact with the cam 69.

The lever I20, which similarly is swingably mounted on the fulcrum rod68, is likewise capable of co-acting by means of its reanwardly directedarm, I20a (Figure 3) with the cam 69.

By means of the spring I23 which engages with the pin I2I and, on theother hand, is connected to a pin I22 (Figure l) of the bridge I05, thelever I20, is acted on in the clockwise direction round the fulcrum rod68, whereby the projection I201) of this lever contacts with a lip I20c,fixed to the key locking bar III], and the normal position of the leverI20, l20a is thereby determined. I

On the left-hand side of the machine is arranged the total key 226aindicated by TV (Figure for conditioning the machine for taking theindividual totals of the column totalizers T. The' key 226a is attachedto the key lever 228 (Figure'S), which is swingably mounted on thefulcrum rod 68. On the key lever 226 there is no pawl 95, as in the caseof the calculating key levers 82 (Figure 3) in which the downwardlydirected foot of the pawl acts on the bar 91, but the key lever 223(Figure 5) is provided with a wide projection 226a, to engage the bar91, 98. The nose 22Gb of the key lever 226 is capable of co-acting withthe flange I [09 of the key-locking bar I I0. The rearwardly andsomewhat upwardly projecting arm 226d of the key lever 226, is

capable of acting with its somewhat arched face 226e on the somewhatarched face 221 of an arm 228 of an intermediate lever 229. Theintermediate lever 229 is swingably mounted by means of a headed screw230 on a, supporting member 232, which is mounted by means of screws23I, in suitable manner on the machine housing. To the free rearwardlydirected arm 233, of the intermediate lever 229, a draw-bar 235, formedcorrespondingly to that in Figure 5, is jointed by means of a screw 234,which draw-bar is provided with an elongated hole 236, in its freeupwardly directed end. Through this hole a screw 231 pro- J'ects, whichis screwed into a lever 238, fixed on the shaft I92, whereby thedraw-bar 235 is held loosely in connection with the lever 238. Thedraw-bar 235, is connected, in the manner illustrated in Figure 5, witha multiple-armed lever 239, which is swingably mounted in a suitablemanner at 239:1: on the rear wall of the calculating mechanism I26(Figure 1). With the arm 239a of the multiple armed lever 239, a spring240 engages, which at its other free end is connected to a pin mountedin the calculating mechanism, but not illustrated. In consequence of theaction of the spring 240, the draw-bar 235 is acted on in the directionof the arrow b, whereby its normal position is determined by striking ofthe key lever 226 against a universal key stop 226s arranged on themachine housing.

On the right-hand side of the machine, the key 329 for conditioning themachine for taking totals of the cross totalizers QI and Q2, isarranged. The key 329 is attached to the key lever 330 (Figure 6)swingably mounted on the fulcrum rod 68, the key lever beingcorrespondingly formed to that illustrated in Figure 5. The nose 330a,of the key lever 330, is capable of oo-acting with the nose IIOg of thekey-locking member IIO, and the bearing edge 330b of the key lever 330is capable of coacting with the detent bar 98. The

rearwardly directed end of the key lever 330, is

fast on the slide 331, and to a pin 339 (Figure 6) on the frame of themachine, normally urges the slide 331 in the direction of the arrow aand holds the cross totalizer total conditioning key 329 in its elevatedposition. On depression of one of the calculating keys 34, the pawl 95(Figures 1, 3) arranged on the key lever 82, acts on the rightangledupwardly'bent nose 91, of the detent bar 98, mounted on the pins 98a(Figures 3 and 4) and swings the bar in the clockwise direction againstthe action of the spring I09. As a result, the edge 98's of the lug98:1: (Figure 3) of the detent bar 98, slides from the edge I03g of thebracket, lug I03a, which is formed as a stop whereby the levers I00, WIand rocking arm III rigidly mounted on the shaft 99, and further, theclutch control lever I I4, mounted on the fulcrum rod 68, and inengagement with the rocking arm I I I, by means of the pin-slotconnection I I2, can follow the pull of the spring II5.

On the swinging of the detent bar supporting levers I00, IOI with thedetent bar 98 in the anti-clockwise direction, the nose 91 of the bar 98which nose was engaged by the pawl 95 of the particular calculating keydepressed, now slides rearwardly underneath the foot 95d of the pawl 95.The key locking bar IIO, swingably arranged on the shaft 99, which, atits ends on account of the pull of the spring I I01), lies against pinsI00b and I 0Ib, respectively, of the detent bar supporting levers I00,IOI, which pins rock the key-locking bar I I9 counterclockwise due toment with the stop I03a.

the tension of spring II5 which rocks shaft 99 upon release of thedetent bar 98 from engage- This movement of the locking bar IIO shiftsthe rearwardly directed locking flange IIO'g over a nose 92h (Figure 3)of the depressed key lever 82, and locks the same in the depressedposition. Further, the lip I20c, fixed to the locking bar I I0,participates in the swinging movement and slides along on the under edgeof a latch lever I20 (Figure 3) swingably mounted on the fulcrum rod 68and, in consequence of the pull of the spring I23, attached to the leverI20, is held in the recess I20d until after a revolution of the couplingincluding the cams 69, H, 12, the lever I20, the lip I20c, as well asthe key locking bar IIO, are released again. A depressed calculating keylever, therefore, is not released again, owing to the locking means,I20c and I20d, until the corresponding value has been transferred.Further, simultaneous depression of two calculatin keys 34, cannot takeplace owing to a roller look (not illustrated). As already explained, onstriking the calculating key 82, the

system of levers I00, IOI and III, attached to the shaft 99, as well asthe multiple-armed clutch control lever H4, swingably mounted on thefulcrum rod 68, are released, whereby the latter lever under the pull ofits spring I I5, is swung in the direction of the arrow m (Figures 3 and1). The nose H412 of the upwardly-directed arm lI4a, of the lever H4,releases the member 80, of the pawl 14. The downwardly-directed arm II4b of the clutch control, on the other hand, has moved into the path ofmovement of the cam 12. Since the pawl 14 is displaceable in relation tothe cam 12, by means of the pin-slot connection 15, 13, 11, 18, underthe influence of the compression spring 19, and was locked by the noseII4:1: of the lever II 4, the pawl 14 will follow in the arrow direction0 under the pressure of the spring 19, to enter its tooth 14a intoengagement with the toothed wheel 13, continually rotated, whereby allthree cam 69, H and 12,

are coupled with the toothed wheel. 13., so that they participate in therotational movement of the toothed wheel and in the arrow direction b(Figures 1 and 3). 7

Now the cam 89 comes into operation at 162 degrees on the end I 28a ofthe latch lever I28, whereby this lever is swung against the action ofits spring I23. Consequently the nose I281), of the latch lever I20,releases the lip I280 of the key locking bar III), whereby this herunder the action of its spring II 8b (Figure 4) tensioned by theprevious return of the. bar 98 into its rest position, likewise movesback into its rest position. Accordingly, the nose 82h (Figure 3) of thecalculating key lever 82 is released, and the calculating key 82, 34returns into the rest position, whereby the pawl 95, mounted on'thecalculating key lever 82, also rests again over its lug '97 of the bar98.

Finally, as the clutch is completing its revolution, the nose 80 f thepawl I4, mounted on the coupling disc I2 (Fig. 3) contacts the nose H42:of the clutch control lever H4, already located in its rest position,whereby the pawl I4 is brought out of engagement against the action ofits spring I9, with the wheel I3 of the continually rotating shaft 58.In order to prevent the cam series 69, TI, I2 from springing back at themoment when the pawl I4 is raised out of engagement with the toothedwheel I3, the roller III of the roller lever Il6, snaps behind the highpoint of the cam 69 under the action of its strong spring I I9, wherebythe cam series 89, II, I2 is held in the relative positions illustratedin Figure 3 In order to withdraw an amount from any of the crosstotalizers QI and Q2, and register it automatically in the correspondingcolumn totalizer, it is necessary to depress the key 329 (TC) whichconditions the machine to print totals from the cross-footers orcross-totalizers.

Upon depression of the key (TC) 329 (Fig. 6) the face 33% of the keylever 330 acts. on the appropriate nose 9! of the rocking detent bar 98and rocks th detent bar in the clockwise direction against the action ofthe spring I89 (Figm'e 3). In this movement the lug 98w (Figure 3) ofthe rocking detent bar 98, slides from the edge I039 of the bracket I83,which is formed as a stop, whereby the levers I88, Hill, I I I, rigidlymounted on the shaft 99 and the clutch control lever II4 mounted on thefulcrum rod 68 follow the pull of the spring H5.

By the resulting swinging. movement of the clutch control lever I I4 inthe clockwise direction the pawl I4 is released to engage with the wheel73, whereby the cams I2, II, 69 participate in the rotation of the driveshaft 58 in the direction b. The depressed key 329 for conditioning themachinefor taking totals of the cross totalizers QI and Q2 is thus heldautomatically in depressed position in the manner hereinafter described,until the cross totalizer QI is cleared, the pawl It remaining inengagement with the wheel I3 also for this period of repeated cycles ofthe machine.

Afterthe shaft 58 and with it the cams 72, II, 69 have commenced torotate in the direction b (Fig. 3) the cam IZ-acts first onthede-clutching arm I Mb of the clutch-control lever H4 and swings the sameagainst the action of its spring I I and in the opposite direction ofthe arrow m, whereby the parts III, 99, I88, IDI and 98 are swung in theclockwise direction, while the locking bar H0 at this point is stillheld in its anticlockwise position by the engagement of the recess I2Ildof the latch lever I29 with the lip I290. In the swinging of the detentbar 98 in the clockwise direction, however, its nose 9! slides along onthe projection 3381) of the lever 330 of the key 329 whereby the lug98a: of the bar 98 cannot engage with the stop I03a of the bracket I93.Consequently, the parts III, I88, IIJI, 98 (Figure 6) are not held atthe end of their clockwise swinging movement but instead, on thecontinued rotation of the cam I2 yield to, the action of the tensionedsprings H5 and H81) so that the clutch control lever I I4, therefore, isswung again in the arrow direction m and the parts III, I80,

IDI, 98 are swun in the anti-clockwise direction,

whereby the tension of the springs H5 and Hill) is diminished.

When, shortly before the end of the first revolution of the cams I2, II,69, i. e., shortly before the termination of the calculating operationin the first or highest denomination, the latch lever I28 by thecooperation of its arm I29a with the projection 69b of the cam 69 isswung round the fulcrum rod 68 against the action of the spring I23, theco-acting latching members I20d and I280 are disengaged. Since, however,at this point the parts III, 99, I88, Illl and 96 under the action ofthe spring H5 attached to the clutch control lever H4 are alreadyswung-again so far in the anti-clockwise direction that the pins I801)and Hill) contact with the locking bar IIB which, up to this point hasbeen held in key-locking posi-. tion by the latch lever I20, the pinsI88!) and I IlIb in the counter-clockwise travel of the detent bar 98,hold the key-locking bar II 8 effective until the nose I281). of thelatch lever I20 snaps behind the lip I280. By this time, according tothe foregoing, the parts H4, III, I08, 99, IIII and 98 have been broughtback again into the working position by means of the spring I I5, thenose H43: of the ole-clutching arm 4a of the clutch control lever H4 hasagain moved outof operative relation to the nose 80 of the pawl I4,whereby the cam series 12, I I, 69 is not uncoupled after completion ofits first revolution but commences a further revolution and consequentlya new calculating operation.

This operation is repeated for each denomination of the cross totalizerQI so that, therefore, the key 329 in accordance with what has been saidabove, is held automatically depressed until the totalizer QI iscleared.

Upon the completion of the printing of a total,

* the machine is brought to rest as follows:

When the cross footer-totalizer QI and its associated column totalizer Tarrive in their lowest decimal positions, and the units digit isprinted, a carriage step occurs automatically, as in the printing of thedigits of higher orders, which locates the cross footer and its columntotalizer in their sub-units positions relatively to their respectivemaster wheels 392 and I89.

This step of movement of the column totalizer shifts its cam blade 8125(Fig. 7) with which each column totalizer is provided, past the nose 81son the forward, laterally-offset arm of a locking lever 81s journaled onthe column totalizer master wheel shaft I86, and urged incounter-clockwise direction by a spring 811).

As the cam blade SIt escapes past the nose 81s of the locking lever 81s,the locking lever is rocked counter-clockwise by its spring 871; toeffective position, and its nose 8Is' is projected upwardly into thespace 811." formed between the adjacent ends of the cam blades 8116 oftwo adjacent column totalizers, or past the trailing end of the camblade 8It of that totalizer associated with the cross totalizer, ifthere are no succeeding column registers.

The wiping engagement of the cam 81: with the nose 81s of the lockinglever 81s has caused the locking lever to maintain an intermediate lever8Ir pivoted at 8Iq in its counter-clockwise position against the tensionof a spring 8110, connected to a vertically shiftable bar 8In and to astationary part I39 of the frame of the machine, the upper end of theshiftable bar being pivoted to the tail of the intermediate lever 811'.

The vertically shiftable bar 811: is guided by a stud BIp on the bartraversing a slot 810 in the part I39 of the machine frame, the lowerend of the bar carrying a pin or projection 81k overhanging a wear plate8|;i secured to the upper end of a slotted arm 81:.

The lower end of the slotted arm is fast to a lateral offset 81d of acheck lever 81d journaled on a pivot 81c supported by a bracket 81mounted on a stationary part of the machine.

A second bracket 81m fastened to a cross bar lever 8' by the cam blade81?? and locking lever 81s, the spring 81w draws the verticallyshiftable bar Bln downwardly, rocking the intermediate lever BIrclockwise, and forcing the projection 81k at the lower end of theshiftable bar against the wear plate 817' to thrust the sliding arm BIidownwardly and rock the check lever 81d counterclockwise against thetension of its spring 8150.

past the inclined forward end 8161" of the check lever 87d whichthereupon snaps upwardly into the return path of the horn to latch thedetent bar 98 against return under the influence of the clutch-controllever spring H5.

The check lever 81d, by thus restraining the detent bar 98, is effectiveto retain the clutch control lever H4 is de-clutching position.

Thus, shortly prior to the completion of a rotation of the clutch, thecam 69 disengages the latch lever I20 from the lip I200 of thekey-locking bar IIO, whereupon the springs I IOb which have beentensioned on the clockwise rocking of the detent bar 98, rock thekey-locking bar clockwise to disengage its flange I ID from thedepressed total key 329 which is then returned to its normal position byits spring 338 (Fig. 6).

The total key 329, as it returns, releases the detent bar 98 to theaction of its spring I09 which thereupon rocks the detent barcounter-clockwise relatively to its supporting arms I00, II to positionthe nose 98x of the detent bar in front of and in contact with the edgeI03g of the stop lug I03a of bracket I03.

Meanwhile, the clutch pawl I4 has contacted the rear end H41: of theclutch control lever H4, and has been disengaged from the ratchet wheelI3, and the machine comes to rest.

It will be understood that the check-lever 81d (Fig. 7 normally remainseffective, and becomes ineffective only when the locking lever 81s isrocked by the engagement therewith of a cam blade Bit of a columnregister T.

Depression of the 'IV-key 226a (Fig. 5) to condition the machine fortaking totals from the column totalizers T, operates by way of the partshereinbefore described, to release the pawl I4 (Fig. 3) for engagementwith the toothed wheel 13, and the three cams 69, ll, I2, participate inthe revolutions of the drive shaft 58. In this case, also the pawl I4,remains in engagement with the toothed wheel I3, as long as the keylever 226 is held depressed, since in consequence of the face 226a(Figure 5) of the key lever 226, the nose ll4zc (Figure 3) of the clutchcontrol lever H4, cannot enter into the path of movement of the nose 89of the pawl I4, and hence, the tooth 14a of the pawl is not disengagedfrom the toothed wheel I3. 7

At the termination of a total printing and clearing operation of a crosstotalizer, the key 329 for conditioning the machine for taking totalsfrom the cross footers or totalizers is released as heretoforeexplained.

I claim:

1. In a typewriting-calculating machine, the combination withcalculating keys, and a powerdriven clutch; of means to control theeffectivity of the clutch, including a clutch control member todisconnect the clutch and shiftable to position to free the clutch foroperation, a spring to shift the clutch control member to position torelease the clutch for operation, a, locking device common to thecalculating keys for operation thereby, and connected with the clutchcontrol member for movement therewith in one direction and return, andalso relatively thereto in a different direction; and a stationaryarresting element engageable by the locking device upon its movement insaid different direction relatively to the clutch control member, toretain the clutch control member in position to disconnect the clutch,and to maintain the clutch disconnected against the tension of saidspring.

2. In a typewriting-calculating machine, the combination withcalculating keys; and a powerdriven clutch; of means to control theefiectivity of the clutch, including a clutch control member todisconnect the clutch and shiftable to position to release the clutchfor operation, a spring to shift the clutch control member to positionto release the clutch for operation, a locking device coupled with saidclutch controlling member, and supported for movement therewith in onedirection and return, and for movement relatively thereto in a differentdirection, a fixed arresting element engageable by the locking deviceupon its movement in said different direction relatively to the clutchcontrol member to latch the locking element and the clutch controlmember in their effective positions, said locking device beingshiftable, under control of any of the calculating keys, out ofengagement with the fixed arresting element to enable said spring toshift the clutch control member to free the clutch for operation, and anormally idle key-locking device shiftable under control of said firstnamed locking device into locking engagement with the depressedcalculating key to hold-said key in depressed position against prematurereturn while the clutch-control member remains in its clutchfreeingposition.

3. In a typewriting-calculating machine, the combinationwith calculatingkeys; and a powerdriven clutch; of means control the effectivity of theclutch, including a clutch control member to disconnect the clutch andshiftable to position to release the clutch for operation, a spring toshift the clutch control member to position to release the clutch foroperation, a locking device coupled with said clutch controlling member,and supported for movement therewith in one direction and return, andfor movement relatively thereto in a difi'erent direction, a fixedarresting element .engageable by the lockingdevice upon its movement insaid different direction relatively to the clutch control member tolatch the 1 locking element and the clutch control member in theirefiective positions, said locking device being shiftable, under controlof any of the calculating keys, out of engagement with the fixedarresting element to enable said spring to shift the clutch controlmember to free the clutch for operation, a normally idle key-lockingdevice shiftable under control of said first named looking device intolocking engagement with the depressed calculating key to hold said keyin depressed position against premature return while the clutch-controlmember remains in its clutchfreeing position, and spring linkconnections between the first-named locking device and the key-lockingdevice tensioned by said first-named locking device as it returnstowards its normal position, to restore the key-locking device to itshome position to release the depressed calculating key.

4. In a typewriting-calculating machine, the combination withcalculating keys; and a powerdriven clutch; of means 'to control theeifectivity of the clutch, including a clutch control member todisconnect the clutch and shiftable to position to release the clutchfor operation, a spring to shift the clutch control member to positionto release the clutch for operation, a locking device coupled with saidclutch controlling member, and supported for movement therewith in onedirection and return, and for movement relatively thereto in a differentdirection, a fixed arresting element engagealole by the locking deviceupon its movement in said different direction relatively to the clutchcontrol member to latch the locking element and the clutch controlmember in their effective positions, said locking device being shiftableout of latching engagement with the fixed arresting member to enablesaid spring to shift the clutch control member to free the clutch foroperation, a one-way pawl on each calculating key ,engageable with saidlocking device upon depression of its key, to disengage the lockingdevice from latching engagement with the fixed arresting element, saidlocking device, When shifted by said spring subsequently to suchdisengagement from its arresting element, operating to rock the one-waypawl of the depressed key to inoperative position; and means to restoresaid pawl to operative position as the depressed key restores to itsnormal position.

5. In a typewriting-calculating machine, the combination with a totalkey for conditioning the machine to print a total, and a power-drivenclutch; of means to control the efiectivity of the clutch including aclutch control member-normally effective to maintain the clutch membersdisconnected, and shiftable to a position to free the clutch foroperation, a spring to shift the clutch controlmember to position torelease the clutch for operation, a normally latched locking deviceconnected with the clutch control member for movement therewith andreturn, a fixed arresting element, means operable by the clutch topositively restore the clutch control member to effective position, andto restore its locking device to position to co-act with the fixedarresting element to latch the clutch control member in its effectiveposition; means operable upon the locking device to elfect the latchingthereof and of the clutch control member in their respective effectivepositions at the completion of a single rotation, means on the total keywhich, upon depression of the total key, prevents latching of thelocking device and its clutch control member in their efiectivepositions; and means operable upon the locking device subsequently tothe conclusion of the total printing operation, to retain the clutchcontrol member in effective position notwithstanding the continueddepression of the total key.

6. In a typewriting-calculating machine, the combination withcalculating keys, and a powerdriven clutch; of clutch control means,including a clutch control member shiftable to one or. another positionto enable couplin and uncoupling of the clutch, a spring to shift theclutch control member to position to enable coupling of the clutch, alocking device for the clutch control member operable by any .of thecalculating keys to release the clutch control member to the action ofits spring, and supports for said locking device connected with theclutch control member to rock therewith, said locking device beingpivotally mounted in said supports to rock relatively thereto in adirection substantially perpendicular to the direction in which thesupports rock.

7. In a typeWriting-calculating machine, the combination withcalculating keys, and a powerdriven clutch, of a clutch controlmechanism for coupling and uncoupling the clutch, including a clutchcontrol member shiftable to one position to enable a coupling operationand to another position to effect an uncoupling of the clutch, a lockingdevice to maintain the clutch control member in position to effectuncoupling of the clutch, and operable by any of the calculating keys, anormally ineffective key-locking device to retain a depressedcalculating key in operated position, and shiftable by said lockingdevice to its effective and ineffective positions; and means operable bythe clutch, when coupled, to restore the locking device to its efiectiveposition and the key-locking device to its ineffective position.

8. In a typewriting calculating machine, the combination withcalculating keys, and a powerdriven clutch; of a clutch controlmechanism including a clutch control member, rocking sup ports connectedwith the clutch control member, a locking device mounted on saidsupports to retain the clutch control member in position to maintain theclutch disengaged, and releasable by the calculating keys, a key-lockingdevice operable under control of said locking device to look a depressedcalculating key in operated position, clutch-controlled latching meansto retain the key-locking device in its efiective position andoperativeto release the key-locking device for return to idle position at the endof a single cycle of the clutch, and means operable prior to the releaseof the latching means to restore said locking device for the clutchcontrol member notwithstanding the retention of the key-locking devicein its effective position.

9. In a typewriting calculating machine, the combination with apower-driven clutch, and a total key; of means to control theefiectivity' of the clutch, including a clutch control member, a lockingdevice normally latched to retain the clutch control member inclutch-disengaging position, and releasable by the total key to enablethe clutch control member to free the clutch for operation, means torestore the clutch control member and its locking device to theireflective positions at each clutch cycle, and means on the total key toprevent latching of the locking device in its effective position toenable continued cycling of the clutch.

10. In a typewriting calculating machine, the combination withcalculating keys, and a powerdriven clutch, of means to control theeffectivity of the clutch, including a clutch control member, a lockingdevice normally latched to retain the clutch control member inclutch-disengaging position, and releasable by the calculating keys toenable the clutch control member to free the clutch for operation, meansto restore the clutch control member and its locking device to theireffective positions at each clutch cycle, and means individual to thecalculating keys and operable by the locking device as the clutchcontrol member frees the clutch for operation, to render the depressedcalculating key inefiective relatively to the locking device until thedepressed key restores to normal.

11. In a typewriting-calculating machine, the combination. with atraveling carriage, a powerdriven clutch, and a total key; of means tocontrol the efiectivity of the clutch, including a clutch controlmember, a normally latched lookin device to retain the clutch controlmember in clutch-disengaging position, means on the total key to releasethe locking device, upon depression of the total key, to enable theclutch control device to free the clutch for cycling, means to restorethe clutch control member to position to eiTect disengagement of theclutch at each clutch cycle, said means on the total key rendering thelocking device ineifective to retain the clutch control member in itsclutch disengaging position, and carriage-controlled means operable atthe end of a totaling operation, to detain the locking device and theclutch-control member in the positions to which they have been returnedby said restoring means.

12. In a typewriting-calculating machine, the combination with atraveling carriage, a total key and a power-driven clutch; of clutchcontrol mechanism including a clutch control member; a normally latchedlocking device efiective to retain the clutch control member inclutch-disengaging position, means on the total key to release thelocking device upon depression of the total key to enable the clutchcontrol device to free the clutch for cycling, means to restore theclutch control member to position to effect disengagement of the clutchat each-clutch cycle, said means on the total key rendering the lockingdevice ineffective to retain the clutch control member ,in its wherebythe clutch continues to cycle, a normally idle check means for thelocking device, and carriage controlled means to shift the check meansinto the path of the locking device to retain said clutch control memberin clutch-disengaging position at the end of a totaling operation.

13. In a typewriting-calculating machine, the combination withcalculating keys, and a power driven clutch; of a clutch control membernormally in clutch-disengaging position, a locking device normallyefiective to retain the clutch control member in clutch-disconnectingposition, and releasable by the calculating keys, respectively, to freethe clutch for cyclic operation, a normally idle key-locking devicecommon to the calculating keys, to retain any of said keys depressedduring the cycling of the clutch, means operable by the clutch at eachcycle to restore the clutch-control member and its locking device to-clutch-disengaging position, and means tensioned by said locking deviceon its return to normal clutch-disengaging position, to restore thekey-locking device to its normal idle position.

14. In a typewriting-calculating machine, the combination withcalculating keys, and a power driven clutch; of a clutch control membernor mally in clutch-disengaging position, a locking device normallyeffective to retain the clutch control member in clutch-disconnectingposition, and releasable by the calculating keys, respectively, to freethe clutch for cyclic operation, a normally idle key-locking devicecommon to the calculating keys, to retain any of said keys depressedduring the cycling of the clutch, means operable by the clutch at eachcycle to restore the clutch control member and its locking device toclutch-disengaging position, clutch operated means to latch thekey-locking device in its effective position, said clutch operated meanseffective' subsequently to the operation of means for restoring theclutch-control member, to release the key-locking device for return toits idle position.

15. In a typewriting-calculating machine, the combination withcalculating keys, and a powerdriven clutch; of means to control theeffectivity of the clutch, including a clutch control member shiftableto positions to enable coupling and uncoupling of the clutch, a springto shift the clutch control member to position to enable coupling of theclutch for operation, locking means to normally latch the clutch controlmember against operation by said spring, and releasable by any of thecalculating keys to free the clutch control member to the action of saidspring, means to restore the locking means to effective position, andmeans individual to the respective calculating keys, and operable by thelocking means upon its release by a depressed key to disable the controlof the locking means by said depressed key, whereby to enablereestablishment and retention of the locking means in effective positionnotwithstanding continued depression of a calculating key.

HUGO ERNST clutch-disengaging position,

